/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.itbase.runtime;

import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.List;

/**
 * The implementation of {@link ResultSetMetaData} in cluster test.
 */
public class ClusterResultSetMetaData implements ResultSetMetaData {

    private final List<ResultSetMetaData> metaDataList;
    private final List<String> endpoints;

    public ClusterResultSetMetaData(List<ResultSetMetaData> metadataList, List<String> endpoints) {
        this.metaDataList = metadataList;
        this.endpoints = endpoints;
    }

    @Override
    public int getColumnCount() throws SQLException {
        RequestDelegate<Integer> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(rs::getColumnCount);
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public boolean isAutoIncrement(int column) throws SQLException {
        RequestDelegate<Boolean> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.isAutoIncrement(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public boolean isCaseSensitive(int column) throws SQLException {
        RequestDelegate<Boolean> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.isCaseSensitive(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public boolean isSearchable(int column) throws SQLException {
        RequestDelegate<Boolean> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.isSearchable(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public boolean isCurrency(int column) throws SQLException {
        RequestDelegate<Boolean> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.isCurrency(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public int isNullable(int column) throws SQLException {
        RequestDelegate<Integer> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.isNullable(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public boolean isSigned(int column) throws SQLException {
        RequestDelegate<Boolean> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.isSigned(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public int getColumnDisplaySize(int column) throws SQLException {
        RequestDelegate<Integer> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getColumnDisplaySize(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public String getColumnLabel(int column) throws SQLException {
        RequestDelegate<String> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getColumnLabel(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public String getColumnName(int column) throws SQLException {
        RequestDelegate<String> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getColumnName(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public String getSchemaName(int column) throws SQLException {
        RequestDelegate<String> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getSchemaName(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public int getPrecision(int column) throws SQLException {
        RequestDelegate<Integer> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getPrecision(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public int getScale(int column) throws SQLException {
        RequestDelegate<Integer> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getScale(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public String getTableName(int column) throws SQLException {
        RequestDelegate<String> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getTableName(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public String getCatalogName(int column) throws SQLException {
        RequestDelegate<String> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getCatalogName(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public int getColumnType(int column) throws SQLException {
        RequestDelegate<Integer> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getColumnType(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public String getColumnTypeName(int column) throws SQLException {
        RequestDelegate<String> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getColumnTypeName(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public boolean isReadOnly(int column) throws SQLException {
        RequestDelegate<Boolean> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.isReadOnly(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public boolean isWritable(int column) throws SQLException {
        RequestDelegate<Boolean> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.isWritable(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public boolean isDefinitelyWritable(int column) throws SQLException {
        RequestDelegate<Boolean> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.isDefinitelyWritable(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public String getColumnClassName(int column) throws SQLException {
        RequestDelegate<String> delegate = createRequestDelegate();
        for (ResultSetMetaData rs : metaDataList) {
            delegate.addRequest(() -> rs.getColumnClassName(column));
        }
        return delegate.requestAllAndCompare();
    }

    @Override
    public <T> T unwrap(Class<T> iface) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean isWrapperFor(Class<?> iface) {
        throw new UnsupportedOperationException();
    }

    /**
     * As all the ResultSetMetaData are on local, there's no need to request in parallel
     */
    private <T> RequestDelegate<T> createRequestDelegate() {
        return new SerialRequestDelegate<>(endpoints);
    }
}
